Bead ring-mold for casting pipe.



No. 644,629. Patented mar. a, |900.

C. W. OSBUN.

BEAD RING MOLD FOR CASTING PIPE.

(Application filed. Mar. 30, 1

PATENT FFTCE.

COLONEL W. OSBUN, OF NEVOOMERSTOVVN, OHIO.

BEAD RING-MOLD'FOR CASTING PIPE.

SPECIFICATION forming part of Letters Patent No. 644,629, dated March 6, 1900.

Application led March 30, 1898. SeriaYNo. 675,767. (No model.)

To @ZZ whom t may concern.-

Be it known that I, COLONEL W. OsE'UN, a citizen of the United States, residing at Newcomerstown, in the county of Tuscarawas and State of Ohio, have invented a certain new and useful Improvement in Bead Ring-Molds for Casting Pipe, of which the following is a specification.

My invention relates to molds for casting pipe, and especially to molds for forming the bead on the smaller end of water, sewer, and gas pipes, and has for one of its objects to provide a mold that will always make a uniform bead. l

Another object of my invention is to provide a pattern that will save time, since it is always in place and its action is automatic.

Another object of my invention is to provide a pattern that will always make a fullsized bead, since the patterns own weight will force it into place.

Another object of my invention is to provide a pattern that will be practically indestructible, thereby reducing the cost of castiron pipe.

Another object of my invention is to provide a pattern that will not rub any part of the mold, so that when the mold is blackened it will not wash.

These objects I accomplish in the manner and by the means hereinafter fully described, and particularly pointed out in the claims, referencev being had to the accompanying drawings, in which like reference-letters indicate like parts in all the figures.

Figure l is a partial vertical section showing my invention and partof a pattern-mold and iiask. Fig. 2 is a vertical sectional view of a flask and mold with a pattern having my improvement in place therein. Fig. 3 is the same with pattern partially withdrawn from mold. Fig. 4 is a detail view of a section of bead-ring pattern with its spring attached. Fig. 5 is a detail view of lug. Fig. 6 is a horizontal sectional view on line x Fig. l.

A is the flask; B, the mold, O, the pattern 5 D, a circular chill-steel plate adapted to form the bottom of the flask A and provided with a central opening d, and E the centering-plug, conical in shape and adapted to tit snuglyinto the opening d in the chill-plate D.

My invention consists of a ring F, of suitable material, preferably steel, brass, cast or wrought iron, in sections f, said sections having wedge-shaped openings f between them, the base of the Wedge downward. Each section f is secured to the lower end of a spring G, which extends upward into a hole gin the pattern, where it is secured and which tends todraw the section finward toward the center; The sections f, composing the ring F, rest in an annular groove H, rectangular in cross-section at the bottom of the pattern C, where it joins the plug E, the top of which plug E is of smaller diameter than the bottom of the pattern C. The groove His deep enough to allow the section f of the ringF to be drawn inward toward the center even with or below the circumference of the bottom of the pattern C. If desired, the .groove H may be made wide enough, as shown by dotted line h, to allow some play up and down to the sections f, the springs G being then loose in the holes g, as shown in Fig. l by the spring G in dotted lines, and free to slide up and down in the pattern C. Below the openings f' in the plug E are longitudinal recesses e, having grooves on either side at the bottom, in which recesses c blocks e, of any suitable material, preferably steel, slide up and down, the back part fitting in said grooves. The blocks e are wedge-shaped and adapted to enter the openings f between the sections f of the ring F and force them apart, thereby increasing the size of the ring F.

The operation of my inventionis as follows:

The pattern O is inserted in the flask A, the

plug E entering the opening d in the chillsteel plate D, which presses the blocks e' into the openings f and enlarges the ring F until it stands out beyond the bottom of the pattern O sufficiently to form the desired bead. After the mold B is formed the pattern O is lifted, the pressure of the sand forming the mold B causing the blocks e to fall back into the recesses e, allowing the sections f to draw together and the ring F to collapse, when the pattern O, the ring F, and the plug E are withdrawn together, the ring F offering no surface beyond the circumference of the pattern C to interfere with such withdrawal.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. A bead-ring pattern consisting of a mainpipe pattern, a groove at the bottom of said pattern, collapsible-ring sections adapted to work in said groove, said sections having wedge-shaped openings between them and wedge-shaped blocks adapted to enter said wedge-shaped openings,said sections and said blocks forming a collapsible ring, substantially as shown and described.

2. In an apparatus for casting pipe, a pattern having. at the bottom a centering-plug and just at the top of said plug an annular groove,reotangnlar in cross-section,and holes extending from said groove up into said pattern, a ring fitting in said groove and composed of sections, springs attached to the inside of said sections and extending up into the holes in said pattern, wedge-shaped blocks adapted to enter the opening between adjoining sections, and means for expanding said ring, substantially as shown and described.

3. In an apparatus for casting pipe, a pattern having at the bottom a centering-plug and -just at the top of said plug an annular groove, rectangular in cross-section, and holes extending from said groove up into said pattern, said plug provided with longitudinal recesses extending downward from the top of said plug, the bottom of said recesses being grooved on each side, a ring fitting in said groove and composed of sections, springs attached to the inside of said sections and eX- tending up into the holes in said pattern, and wedge-shaped blocks tted in said recesses and adapted to enter the openings between the sections of the rin g,substantially as shown and described.

In testimony whereof I hereto aiiix my signature in the presence of two witnesses.

COLONEL \V. OSBUN.

\Vitnesses:

F. I. DUNBAR, o JACOB W. REMs'ro'r. 

